v0.14.0 - Mobile-First Redesign & Agent Reliability Fixes

• Site-wide mobile responsiveness overhaul: sidebar becomes a slide-in hamburger drawer below the md breakpoint (was a static 208px column that ate over half the screen on a phone), chat widget becomes a full-width bottom sheet on phones instead of an off-fitting floating panel, and page padding across every route switched from a fixed 40px gutter to a responsive clamp()
• Fixed silent truncation across 3 LLM agents (Critic Review, Portfolio Construction, News Sentiment) where max_tokens was too small to complete a multi-part response - "Missing Risk Factors" and "Key Risks" sections were rendering empty; also fixed a parsing bug that dropped every line of a summary after the first
• Fixed a real regression in the multi-symbol parallel benchmark: os.cpu_count() reported the host machine's total cores instead of the container's actual cgroup CPU quota, causing the "parallel" demo to run slower than sequential on a quota-limited deployment instead of faster
• Fixed an N+1 query pattern in the price-history endpoint (one DB round-trip per row during a full historical re-ingest) and pushed date-range filtering into SQL - a full history fetch that could take minutes now completes in ~3 seconds
• New "How It Works" page: an interactive, expandable explainer covering all 9 major platform subsystems (signals, regime detection, ML forecasting, risk/pricing, portfolio construction, the agentic research pipeline, backtesting, the C++ layer, real-time streaming) in plain English, with an animated data-flow diagram
• Chat widget redesigned: dropped drag-anywhere positioning in favor of a fixed bottom-right corner everywhere, with a clearer "I'm an AI-powered assistant" greeting
• Bulk ticker-universe ingestion endpoint plus a scheduled GitHub Actions workflow to keep price history current automatically, instead of relying on lazy per-request ingestion
• Loading screen's minimum hold tuned to 30-35s (down from 40-45s) so the fun fact / mini-game / portfolio link are genuinely visible without overstaying
• 222 tests passing